Heinrich kurtzig



No. 607,998. A Patented july 26, |898. H. KuRTzlG.

SAFETY DEVICE FR LIFTS.

(Application filed Apr. 6, 1898.) (No Modem www@ f@ HEINRICH KURTZIG, OFINOVRAZLAW, GERMANY.

SAFETY DEVICE FOR LIFTS.

SPECIFICATION forming part of Letters Patent No. 607,998, dated July 26,1898.

Application filed April 6, 1898. Serial No. 676,699. (No model.)

' such as will enable others skilled in the art to which it appertainsto make and use the same. This invention relates to a safety device forlifts and is intended to prevent a lift from falling to the ground withfull force in the event of a band, cord, or the like breaking and thecatching device not acting from any reason. For this object the lift isprovided at the corners of its bottom part with buffers which coincidewith a similar number of buffers arranged on the ground or door of theliftshaft and which receive the shock of the falling lift strikingthereon. As, however, the lift in consequence of the spring reboundwould again be thrown upward, care is taken also to provide a retainingdevice which at the first rebound retains the lift 0n the ground. Thisimproved safety device is shown in the accompanying drawings, in which-Figure l is an elevation of a lift fitted with the safety device. Figs.2, 2, and 3 are details.

On the floor of the lift a buffers 7c la are arranged, which coincidewith buffers t' t" at the bottom of the lift-shaft. If the rope or bandbreak, the lift will fall down through the different floors, The bufferswill, however, absorb the dangerous shock, or at least so diminish itthat violent shakin gs which might produce the breakage of bones orfractures of the skull or the like are avoided. The lift would, however,spring up again on encountering the buffers. In order to prevent this, abar b, provided with severalcatch-teeth c, is arranged in the center ofthe guide-frame. Pawls or bolts ff' engage with these teeth on each sideunder vthe action of springs as soon as the lift-cage encounters thebuffers it. The bolts f f are contained in cases g g', and springs pressthe bolts f f constantly together, said springs being compressed on bars7L between the bolts and the wall of the case g and g', respectively. Ifthe lift-cage encounter the buffers t' i', the taper ends "e of the barb will first force the bolts f f apart, and

said bolts will then immediately close above one of the ratchet-teethand retain the cage and prevent it springing up again. In order that thecage may again be released from this position, the rod b is revolublymounted in guides or supports c d. By means of a handle it may be turnedninetydegrees, so that it assumes the position shown in Fig. 2a. In thisposition the compressed buffer-springs may exert their upwardly-directedpressure, thus drawing the bar b out from between the bolts.

y The arrangement hereinbefore described has for its object to 'increasesafety in the case of lifts which are provided with. safety appliancesor clutch devices and is not intended in any way to replace the ordinarystop or clutch devices. It is generally intended to be employed incombination with the latter as a further means of safety, adapted tocome into action only in those cases where the other devices fail.

Having now particularly described and ascertained the nature of the saidinvention and in what manner the same is to be performed,

I declare that what I claim isl. In combination, the liftcage andliftshaft, the ratchet-bar carried by one of said parts, a pawl carriedby the other part adapted to engage said ratchet-bar, and the bufferdevices interposed between the bottom of the lift-cage and the bottom ofthe shaft, substantially asdescribed.

2.r In combination, the lift-cage and liftshaft, the ratchet-barrotatably connected to one of said parts, a pawl carried by the otherpart adapted to engage said .ratchet-bar, means for rotating theratchet-bar to disengage the pawl therefrom, substantially as described.

In Witness whereof I have hereunto set my hand in presence of twoWitnesses.

HEINRICH KURTZie.

Vitnesses:

M. HAMiURG-nn, CH. TAsUEsKI.

